main.css

footer {
    background-color: #222;
    padding-top: 10px;
    color: white;
}

.navbar-brand {
    color: yellow !important;
    font-size: 20px;
}

.navbar-inverse .navbar-nav > li > a {
    color: white !important;
}

.navbar-inverse .navbar-nav > li > a:hover {
    background-color: black;
    color: yellow !important;
}

div.thumbnail {
    border: 1px solid black;
}

div.thumbnail:hover {
    border: 1px solid yellow;
}

div.caption {
    text-align: center;
}

.link {
    color: gray;
}

.link:hover {
    color: cornflowerblue;
}